Manhole for pipes and similar containers



May 29, '1923. 11,456,503

F. E. JOHNSON, JR

MANHOLE FOR PiPES AND SIMILAR CONTAINERS Filed June 1, 1921 awmewlioz F; E. JQHNEUMJR.

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FRANCIS E. JOHNSON, JR., OF ORANGE, NEW JERSEY, ASSIGNOE TO THE M. W. KELLOGG COMPANY, A CORPORATION OF DELAWVABE.

MANHOLE FUR PIPES AND SIDIIILAB CONTAINERS.

Application filed June 1,

To all whom it may concern:

Be it known that I, FnANoIs l). Jorrnson, Jr., a citizen of the United Edtates, and resident of Orange, New Jersey, have invented certain new and useful Improvements in Manholes for Pipes and Similar Containers, of which the following is a disclosure.

My invention relates to manholes and like normally closed inlets for conduits and has as its principal object the provision of an arrangement whereby the losses in flow capacity oil conduits caused by manholes and like structures are avoided.

The novel features of my invention are pointed out with particularity in the appended claim. The invention itself, however, with further objects and advantages will best be understood from the following description taken in connection with the accompanying drawing in which F 1 is a cross-section of an hydraulic pipe line taken on line 11 of Fig. 2 through a manhole structure according to my invention, certain retained bolts being omitted for purposes or illustration.

Fig. 2 is a plan view of the structure illustrated in Fig. 1, including also portions of the pipe line adjacent the manhole.

In the drawing, 1 is a pipe of forgeable material which has been cut out around the circular line 2 and a manhole structure according to my invention built into the opening thus termed. The manhole structure comprises a pad 3 of torgeable material projecting outwardly from the pipe on the outside and having the usual opening therein normally closed by member 4c. Closure 4 has tiange 5 thereon which contacts with the surt'ace of pad 3 surrounding the opening in the pad. The pad is held in place by the 1921. Serial No. 'ifi.

usual bolts passing thru flange 5, and l refer to provide a central boss 7 on closure 1} into which an eye bolt 8 may be inserted for removing and replacing closure 42 when desired. I attach the pad 3 to the pipe around the line 2 a welding or forging operation.

According to my 'ivention. the inner surfaces of the pad and manhole closure a have the same form as the portion of the pipe removed, being parts of cylinders of the same diameter as the inner surface of pipe 1. li/ioreover pad 3 comes flush with the pipe 1 around the line of union 2 between the pad and the pipe as indicated at 9, while the closure 4 comes flush with the pad 8 around the in er edge of the opening through the pad, indicated at 10. Consequently, the pipe 1 presents a'eon'tinuous inner surface to the fluid flowing therein, there being no shoulders, recesses, or projections to create eddies or otherwise reduce the eiiiciency or carrying capacity of the pipe line, by causing loss of: head.

While I have illustrated and described the preferred form ot my invention, I do not limit myself to details of description or illustration except in so far as such details are clearly included in the appended claim.

Having thus described my invention, I claim:

The combination of apertnred pipe of forgeable material, an apertured pad of torgeable material extending into said pipe, one edge of said pad coining flush with the inner surface or said pipe, the outer surface of said pad being firmly united to the edge of said pipe.

FRANCIS E. JOHNSON, JR. 

